Regenerators of coke ovens



Feb. 10, 1959 J, w, Y ETAL 2,873,231

REGENERATORS OF COKE OVENS Filed Nov. 2, 1955 5 Sheets-Sheet 1 Feb. 10,1959 J. w. HlBY ETAL REGENERATORS OF COKE OVENS 3 Sheets-Sheet 2 TC FgzDayan-tors Jflfizkby v l ifipb Filed Nov. 2, 1955 Feb. 10, 1959 J. w;HlBY ETAL 2,873,231

REGENERATORS OF COKE OVENS File d Nov. 2. 1955 3 Sheets-Sheet 3 Unitedates-Pate REGENERATORS OF COKE OVENS Julius Walther Hiby, Aachen,Germany, and Friedrich Karl Hiby, Cheadle Hulme, England, assignors toSimon-Carves Limited, Stockport, England, a British company ApplicationNovember 2, 1955, Serial No. 544,508

Claims priority, application Great Britain November 8, 1954 3 Claims.(Cl. 202141) This invention relatesto regenerators which are used incoke ovens for the purpose of extracting heat from the hot products ofcombustion and using the said heat for preheating the air or gas priorto combustion, and which consist mainly of a regenerative spacecontaining open brickwork and a flue or flues placed below theregenerative space, through which the gases are led to or away from theregenerative space substantially at right angles to the direction offlow in the regenerative space.

The flue below the regenerative space serves the purpose of distributingthe inflowing gas over the regenerative space or alternatively ofreceiving the outflowing gases from the regenerative space and is oftenreferred to as a bus flue. The nature of the distribution depends on thestatic and velocity pressure conditions along the length of the busflue.

The object of this invention is to provide a simple means by which it ispossible to obtain eflicient distribution of the gases flowing into orout of the regenerative space with less pressure loss than is possiblewith known designs, and moreover Without introducing differences ofstatic pressure between points in the regenerator at the same level sothat undesirable drift of gases across the regenerator is prevented.

According to the invention, inserts are arranged to divide the bus flueinto two parts, one communicating directly with the regenerator inlet oroutlet, in which the flow is in the direction of the bus flue, the otherin which the flow is generally in the direction of the passages throughthe regenerative space, the two parts being interconnected by amultiplicity of curved ducts between the inserts, which ducts open intothe two parts of the bus flue in the directions of the gas flows in thesaid two parts. The flow direction is thus changed as the gas is passingthrough the ducts between the inserts.

According to a further feature of the invention, the inserts are soarranged that the cross sectional area of that part ofthe bus flue whichcommunicates directly with the regenerator inlet or outlet iscorrespondingly diminished as the distance from the inlet or outletincreases, so as to be proportional to the quantity of gas flowing.

The invention allows the distribution of flow into and out of theregenerative space to be effected with a less loss of pressure than inknown designs, as no dampering of the cross section of the flow isnecessary.

Where the bus flue is substantially rectangular in longitudinal section,the inserts may be arranged diagonally,

so that the space on one side of them increases as that i on the otherside decreases. Alternatively the bus flue may be tapered away from theinlet or outlet, in which case the inserts may be substantially parallelwith the under surface of the brickwork in the regenerative space.

Referring to the accompanying drawings:

Figure 1 shows the lower part of a coke oven battery embodying theinvention, the left hand part of the figure being a section on the lineB-B and the right hand part a section on the line C-C of Figure 2.

Figure 2 shows a part of the coke oven in section on the line A-A ofFigure 1.

Figure 3 is an enlarged section of a part of the bus flue illustratingthe arrangement of the inserts.

Figure 4 is a sectional view on the line D-D of Figure 3. I

Figure 5 is a plan view of the inserts.

Figure 6 is an end view of another form of insert.

Figure 7 is a plan view.

Figure 8 is a section of a part of a coke oven battery showing adiflerent arrangement of the inserts.

Referring to Figures 1-5, lean gas for heatipg the oven is introducedthrough a duct 22 to a waste nearest: 1 and passes along a bus fluesection 2a, and between inserts 2b where the direction of flow ischanged, to the upper section 2c of the bus flue. The bus flue 2a, 20 isof rectangular section, the inserts 2b being arranged along a diagonalof the rectangular section so that the space 2c increases incross-section as the space 2a decreases.

The inserts 2b may be preset or may be made movable so that the flowdistribution is adjustable.

The gas then passes upwards through the regenerative spaces 3, where itreceives heat from the hot brickwork, to the heating flues 4 via theducts 5.

Air for combustion of the gas follows a similar path through an adjacentbus flue 6 and regenerative space 7, meeting the gas in the heatingflues 4.

In the case of rich gas heating, the rich gas is led to the heatingflues 4 through pipes 16 without passing the regenerators, bothregenerators 3 and 7 being used for preheating the air.

The direction of flow of gases through the heating system isperiodically reversed. After the reversal, hot waste gases from thefines 4 pass downwards through ducts 5 into the regenerative space 3 and7 where they give up a large part of their heat to the brickwork of theregenerator filling. From there they are conducted in the reversedirection through bus flues 20, 2a and 6 to the waste heat flue 8 to beled away.

Removable stoppings 9 are provided so that it required the inserts maybe adjusted or removed.

The inserts 2b shown in Figures 35 are hollow metal bodies shown incross-section in Figure 3. They are welded into metal end plates 10having beaded edges 11, each pair of end plates carrying two inserts.The end plates 10 rest on sloping ledges 12 formed in the brickwork ofthe duct 2a, 20.

Figures 6 and 7 show an alternative form of insert made of refractorybrick material. This has a solid part 13 of similar shape to the metalinserts shown in Figures 3-5, with integral supporting flanges 14 ateach end.

Figure 8 shows a part of a coke oven battery similar to that shown inFigure 1, but having a bus flue 17 which tapers away from the waste heatbox 1, underneath a horizontal row of inserts 2b, with a space 18 ofuniform cross-section above the inserts 2b and beneath the regeneratorchambers 3, 7.

In each case, the inserts 2b are shaped to have between them curvedducts 19 which guide the air or gas from the horizontal line beneath theinserts to the vertical chambers above them.

This invention is illustrated in connection with a battery of coke ovenshaving a single .waste heat flue, twin divided regenerators and hairpintype heating fines. It should be understood that this invention could beincorporated in other systems of coke ovens as well, e. g. a batterywith two waste heat flues, a battery with triple divided regenerators orwith heating flues arranged in a 3 What we claim is":

I. A regenerator, for use in a coke oven, having a regenerative space,vertically extending walls beneath said regenerative space providing abus flue, and a longitudinally extending partition dividing said busflue into an upper part and a lower part, said partition comprising aplurality of spaced, stepwise aligned, bar-shaped members, each of saidbar-shaped members having an outwardly curved leading edge and aninwardly curvedtrailing edge to provide a multiplicity of curved duetsbetwen said bar-shaped members, the lower part of said bus flue having afloor inclined with respect to said partition so that the crosssectional area of said lower part is decreased at the lower opening ofeach of said curved ducts by substantially the cross sectional area ofsaid opening;

2. The regenerator structure of claim 1 wherein each of the bar-shapedmembers is tapered towards its leading edge, and the radius of curvatureof each of said leading edges is less than the radius of curvature ofeach of said trailing edges to provide flare-shaped ducts between saidbar-shaped members.

3. The regenerator structure of claim 1 wherein said bar-shaped membersare identical and have lug portions at each end for removably supportingsaid members on said bus flue vertical walls.

References Cited in the file of this patent UNITED STATES PATENTS OttoMar.

1. A REGENERATOR, FOR USE IN A COKE OVEN, HAVING A REGENERATIVE SPACE,VERTICALLY EXTENDIG WALLS BENEATH SAID REGENERATIVE SPACE PROVIDING ABUS FLUE, AND A LONGITUDINALLY EXTENDING PARTITION DIVIDING SAID BUSFLUE INTO AN UPPER PART AND A LOWER PART, SAID PARTITION COMPRISING APLURALITY OF SPACED, STEPWISE ALIGNED, BAR-SHAPED MEMBERS, EACH OF SAIDBAR-SHAPED MEMBERS HAVING AN OUTWARDLY CURVED LEADING EDGE AND ANINWARDLY CURVED TRAILING EDGE TO PROVIDE A MULITIPLICITY OF CURVED DUCTSBETWEN SAID BAR-SHAPED MEMBERS, THE LOWER PART OF SAID BUS FLUE HAVING AFLOOR INCLINED WITH RESPECT TO SAID PARTITION SO THAT THE CROSSSECTIONAL AREA OF SAID LOWER PART IS DECREASED AT THE LOWER OPENING OFEACH OF SAID CURVED DUCTS BY SUBSTANTIALLY THE CROSOS SECTIONAL AREA OFSAID OPENING.